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> > This is interesting. Check CNF size and DNF size. Choose smallest.
> > CNF uses existing code, DNF converts to UNIONs. How do you return the
> > proper rows with/without proper duplicates?
>
> Create a temporary oid hash? (for each table selected on, I guess)
>
> Taral
>
What I did with indexes was to run the previous OR clause index
restrictions through the qualification code, and make sure it failed,
but I am not sure how that is going to work with a more complex WHERE
clause. Perhaps I need to restrict this to just simple cases of
constants, which are easy to pick out an run through. Doing this with
joins would be very hard, I think.
--
Bruce Momjian | http://www.op.net/~candle
maillist@candle.pha.pa.us | (610) 853-3000
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